Vehicle



Nov. 28, 1933.

P. T. ROBIN VEHICLE Filed Oct. 25, 1950 FIG. 1

, FIG. 4

IN V EN TOR.

A TTORNEYS.

Patented Nov. 28, 1933 i VEHICLE Philip T. Robin, Erie, Pa., assignor,byimesne assignments, to The Wellman Engineering Company, Cleveland;Ohio, a corporation of Application October 25, I 1930.

3 Claims. (o1.' 2so--s1) In some vehicles, such as trailerswhich aredesigned to carry very heavy loads, it is essential that the load besufliciently distributed to avoid injury to pavements. For this reasonsuch trailers have been supplied with more than twowheels at the rear.The present invention is designed to provide in a convenient mannermountings for eight wheels atthe rear of the trailer. Features anddetails of the invention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawing as fol-2 lows:-

Fig, 1 shows a side elevation of a trailer. Fig. 2 a rear view of thetrailer. 1 Fig. 3 a plan View of a part of thetrailer, part the deckbeing removed struction. i i

Fig. 4 a section on the line 4- 4 in Fig. 2. 1 marks thetrailer body, 2the forward pro jection, or neck, 3 the turn table, 4 a truck carryingthe forward end of the trailer.

of to better show con- The frame has side sills 5 and cross beamsfi.

A cross beam 'lisarranged in the spacebetween the cross beams 6.Preferably it is elevated slightly above the cross beam 6.

A ball 8 has a base 9 which is secured by bolts 10 on the cross piece'7. A bolster 11 extends fore and aft of the cross piece 7. It isprovided with a socket 12 receiving the ball 8. A plate 13 locks theball in the socket.

The front end of the bolster ll has an axle opening 14 through which anaxlel5 extends. Wheels 16 are mounted on the axle 15 at each side of thebolster.

The rear end of the bolster is provided with a trunnion 1'7 which ispivotally mounted in a sleeve 18. A washer 19 abuts the rear end ofthesleeve and this is secured in place by a nut 20 screwed on to the end ofthe trunnion. Cross axles 21 extend from the sides of the sleeve andwheels 22 are mounted on the axles .21.

It will be noted with this construction that there is universal freedom:for the wheels so that all carry their proportionate part of the I load.Thus the bolster can tilt to accommodate Y any lateral unevenness in thesupport for the seria No. 491,133

the opposite end by a ball and socket joint 25 I with abracket 26-fixed'on'the cross member 6 of the frame These pilot rods are of sufficient"ly to the frame will not disturb very materially? V the'alinement of thebolster fore and aft;

It will. be understood that a similar'mounting is provided for asecondsetlof four wheelswat the opposite side of the frame from thatshown in Fig. 3 and a pilot rod '27 is shown which extends to thebolster of this second set; I

What I claim asnew is:.-. I

length so that any rocking of the bolster relative- 1. In a vehicle, thecombination of a frame; a

'fore and aft extending bolster; a universal connection betweenthebolster and frame; cross.

axles'toward one end of and rigid with relation;

torthe bolster; a trunnionftoward the opposite spaced 'from theaxisthereof. l

2. In avehicle, the comb'nation of iram e; ,af 1

[end of the bolster; a sleeve on the trunnion; cross I axlesextendingfrom the sleeve; and wheels on" e the axles on each side of the bolster.and equally fore and aft extending bolster; a universal con- 1nectionbetween the bolster and frame; said con nection-being positivelylocked against severance the bolster at the front and rear thereof; oneof,

the bolster; wheels onthe axles on each side of the bolster and equallyspaced from the axis 891 under thrust from any direction; cross axles onsaid. crossaxles being pivotally connected with,

thereof; and a pilot rod extending crosswise of; the frame connectingthe bolsterand the frame; H

3. In a vehicle, the combination of a frame;

a fore and aft extending bolster; a universal con-1 nection betweenthebolster and frame; cross" axles. on the bolster toward the front andrear .i thereof, oneof said cross axles being pivotally connected withthe bolster; wheels on the axles on'each'side of the bolster and equallyspaced. y

from. the axis thereof; and a pilot rod pivot ally' connected to thebolster. and thexframe, the

points of connectionbeing laterally off-set,

front wheels and the sleeve with the axles can;-'

swing on the trunnion at the rear to permit the rear wheels to swing asmay' be necessary to accommodate any unevenness there may be in theirsupports.

In order to lock the bolster in a fore and aft direction pilot rods 23aresecured by a ball and socket joint 24 to one end of the bolster andat PH L P 'rgPtoBnv. 1

